User`s guide

Table 2–2: Installing Cables for RA3000 Radial Configuration with a
DWZZH UltraSCSI Hub (cont.)
Step Action Refer to:
RA3000 controller shelf with active/active or
active/passive failover: Install a BN37A cable
between any DWZZH-03 port or the DWZZH-05
controller port and the RA3000 controller shelf Host 0
I/O module Host In port. Install a BN37A-0E 0.5
meter cable between the Host 0 I/O module Host Out
port and the Host 1 I/O module Host In port.
Figure 2–2 and
Figure 2–7
RA3000 pedestal with active/active or
active/passive failover: Install a BN37A cable
between the DWZZH-05 controller port and the
RA3000 pedestal Host 0 port. Install a second BN37A
cable between a DWZZH-05 host port and the RA3000
pedestal Host 1 port.
Figure 2–3 and
Figure 2–8
______________________ Note ______________________
If you connect a DWZZH-05 host port to an RA3000 pedestal host port
to provide active/active failover, you must disable fair arbitration on
the DWZZH-05 by placing the fair arbitration switch in the DISABLE
position.
a
The maximum length of the SCSI bus segment, including the BN38C cable and internal device length,
must not exceed 25 meters.
b
The maximum length of the SCSI bus segment, including the BN37A cables and internal device length,
must not exceed 25 meters.
Table 2–3 provides the steps necessary to connect the member systems to
an RA3000 storage subsystem using external termination and Y cables.
Table 2–3: Installing Cables for RA3000 Configuration Using External
Termination and Y Cables
Step Action Refer to:
1 Install a BN21W-0B Y cable on each KZPBA-CB
UltraSCSI host adapter to be connected to the shared
SCSI bus.
Figure 2–9 through
Figure 2–11
2 Install an H879-AA terminator on one leg of the
BN21W-0B Y cable of the member systems that will be
on the end of the shared SCSI bus. The RA3000
controller shelf Host I/O module or pedestal provides
active termination for the other end of the shared
SCSI bus.
Figure 2–9 through
Figure 2–11
3 Install SCSI bus cables:
Using the StorageWorks RAID Array 3000 in a TruCluster Configuration 2–7